M 5.8 in South Georgia and the South Sandwich Islands on 07 Dec 2021 15:55 UTC

Hazard models

EQ parameters
Shakemap
Tsunami

Event summary

This earthquake is expected to have a low humanitarian impact based on the magnitude and the affected population and their vulnerability.

Earthquake Magnitude: 5.8M
Depth: 31 Km
Lat/Lon: -57.4626 , -25.7473
Event Date: 07 Dec 2021 15:55 UTC
07 Dec 2021 13:55 Local
Exposed Population: No people affected in 100km
Source: NEIC us6000ga3a
Inserted at: 14 Dec 2021 07:41 UTC
INFORM Coping capacity of the alert score: 1.1 (South Georgia & the South Sandwich Is.)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 GDACS score
NEIC 0 0
us6000ga3a Scaled population (raster) 0  
  C1 shakemap -0.59  
  C2 shakemap 0.53  
  Country Vulnerability 0  
  INFORM_normalised 1  
Maximum expected impact using different data sources.

ShakeMap is a product of the USGS Earthquake Hazards Program in conjunction with the regional seismic networks. ShakeMaps provide near-real-time maps of ground motion and shaking intensity following significant earthquakes.


Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1414279 0 07 Dec 2021 15:55 5.8M, 34.44km 3.72 No people affected (in 100km) 00:27 NEIC
1415564 0 07 Dec 2021 15:55 5.8M, 31km 3.68 No people affected (in 100km) 6d 15:45 NEIC
The episode that generated the alert; the next major evaluations beyond 12 hours will not trigger additional alerts.
The episode that has the last updated information.
* The max MMI detected for sources having shakemaps;
** The population detected in MMI>=7 for episode with shakemap or in a 100km radius;
*** The tsunami max height.

Exposed population

The earthquake happened in unknowed a zone. The alertlevel for this event is GREEN

Intensity Population


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1414279 -57.512/-25.818 5.8 34.4 3.722 07 Dec 2021 16:24 00:28 (new episode)
2 0 1414279 -57.505/-25.824 5.8 33.4 3.724 07 Dec 2021 17:59 02:03 (upd of #1)
3 0 1414279 -57.505/-25.824 5.8 33.4 3.724 08 Dec 2021 16:00 1d 00:04 (upd of #2)
4 0 1415564 -57.463/-25.747 5.8 31.0 3.675 13 Dec 2021 22:16 6d 06:21 (new episode)

Affected Provinces



Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

More information

For a full list of available products related to this event, please refer to the GDACS Resources page.